I think that's not accurate. Pantheism is the belief that everything is a god (by whatever name you call it). Many Pagans are animists, which is a belief in spirits being within everything. They can go hand-in-hand since the concepts are both similar and "positive" views, but one is purely a spiritual view while the other describes a god, conscious or not.
In fact I'm pretty sure many Pagans (and Druids) believe in spirits of some sort. Many Pagan rituals were made originally to honor spirits, or literal spiritual gods. Not all Pagans believe in spirits (because Paganism can also be treated as a philosophy without accounting for the spiritual) but many traditions do recognize spirits. In addition, many traditions honor an all-encompassing deity or concept as well as spirits.
So I disagree with the entire quote.